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Finding the Fourth Proportional to 260,090.80, 389,867.40 and 141,511.60

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Solution

The fourth proportional to 260,090.80, 389,867.40 and 141,511.60 is: 212,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,090.80 : 389,867.40 = 141,511.60 : x
  2. Step 2: Convert to fraction form
    260,090.80/389,867.40 = 141,511.60/x
  3. Step 3: Cross multiply
    260,090.80x = 389,867.40 × 141,511.60
  4. Step 4: Simplify right side
    260,090.80x = 55,170,759,561.84
  5. Step 5: Solve for x
    x = 55,170,759,561.84/260,090.80
  6. Step 6: Final answer
    x = 212,121.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.